The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 29, 1993
Filed:
Oct. 21, 1992
Masahiro Ikeda, Shimosuwa, JP;
Hideo Usuki, Shimosuwa, JP;
Sankyo Seiki Mfg. Co., Ltd., Nagano, JP;
Abstract
A method for controlling a speed of a motor includes the steps of setting an upper limit threshold level for the thresholding at an upper limit value of the set speed range and a lower limit threshold level for the thresholding at a lower limit value of the set range speed, providing a signal based on a parameter table having a plurality of different duty factors for stepwisely adjusting the speed of the motor so that, when the speed of the motor exceeds the upper limit value, an input of the motor is switched to a signal of a lower rank of duty factor within the parameter table, whereas when the speed of the motor lowers to a speed below the lower limit value, an input of the motor is switched to a signal having a higher rank of duty factor within the parameter table. A motor speed control device for implementing the method includes an ROM element in which signals representing a parameter table are stored and a speed sensor for determining whether the motor speed exceeds a predetermined value or is below a certain value and for applying an appropriate duty factor accordingly.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile